I need to check the parts book on when the change happened, left it at home today. Pictured is fellow stak member 19-65ports' 15-27 before paint, you can see the row of set screws for the lifter guides along the block. Next picture is my block on the stand, one set screw in the center for the center cam bearing retainer.Russ, I'd bet you can guess why I find this photo VERY interesting.
When (even roughly) did the change occur to tappet/lifter guides being built in the blocks instead of separate parts on Case engines?
Not looking for a time-line race between Case and other brands , but find this very interesting and wonder why the mfgr's did not machine integral guides earlier and instead used the separate guides. I'd like to see a pic of a Case engine with that line of eight set-screws...
That lifter is quite similar to a TC tappet even down to the very rough lathe cuts near the base.
Thank you for posting the pic!